Electric cable



Jan. 16, 1934. .w. A. DEL MAR ELECTRIC CABLE Filed March 16, 1952 INVENTOR WM'HDel Maf* BY f ATTO R N EY Patented Jen. 1s, v1934 y 1,944,004

ELECrmC CABLE William A. Del Mar, Greenwich, Conn., assignor to Habirshaw Cable and Wire Corporation, New York, N. Y., a corporation of New York Application March 16, V1932. Serial No. 599,266

1 Claim. (C1. 173-266) High tension electric cables containing oil have providing channels 6 extending along th'e shield-v` been provided with longitudinal oil channels to ed conductor between the shield and sheath 4. permit the free egress and ingress of oil as the The strips 'or separators 5 are held .tightly 1n oil expands or contracts with various temperaplace by a bindertape or band 7 which is heli- 5 tures of the cable. Such cables have been formed cally wound around 'the strips 5, preferably at 60 with a channel in a cylindrical core in the consubstantially right angles thereto, and preferably ductor, or with a pipe in the space between conin a relatively short helical lay, the binder tape or ductors of a multiple-conductor cable. Oil chanband being located between the Strips 5 and the nels have also .been proposed either in the lead sheath 4. The tapes 01' SeDaTOI'S 5 may be leid 1o sheath of the cable or between such sheath and 4in even spaced relation duriner the manufacture 65 the shieldinginsulatign, of the cable, and may be immediately held in My invention relates to improvements in elec- Place by the binder tape 0I' band 7 therearOllnd. trie cables of the class referred to, my object be- The strips or separators 5 may be of paper ing to provide cables with oil channels the walls fiber, fabric, metal 01' other Suitable material ll of which will resist disruption so as not to interadapted i have DlOJ'eCiIiODS 0I' millillgs 5a ex- 70 tere with the new of oil through the ehanne1s. tending therefrom to engage the binder '1 or the My present invention is an improvement in Shield 3. The DrOjeCtOnS a may be Dressed out the class of cables set forth in my application from the Strips 5 in any deSil'ed Way, SUCh aS by med January 14, 1932, serial No. 586,567. In passing the strips between ro11er dies having comzo carrying out my invention I provide an electric Dlementary Projecting and rfi-entrant DaltS t0 75 cable having sheath and shield, with multiple press out the projections. The projections 5 are strips spaced apart and helically laid over the suitably spaced apart along the Strips 01 Sepshield, such strips being held in place by a, binder arators 5 to engage the binder or the shield at or tape of suitable material wound around said Suitable DlaCeS- strips, preferably substantially at right angles In the form SbOWn in FigS- l t0 5 the D10J'ee- 80 thereto, and within the outer sheath, said strips tions 5a from the SiIDS 5 extend outwardly and being provided with projections that engage a engage the binder tape 01 band 7 wIeSiSt dismember of the cable, such as the binder or the DleCemeIli 0f the StripS- The binder 7 may be sheath, to keep the strips from displacement, of suitable material, suchaspaper, cloth or metal,

80 whereby the channels between the strips will not Which Will receive the DIOJ'eCiiOnS 5G that may 85 be deformed or closed by reason of shifting of the enter 01' Pierce ljhe binder; (Fig- 2)- The inner Strips relatively to one amthen surface of the binder 7 may be milled, or rough- Reference is to be had to the accompanying ened, such as securing a Strip of Open mesh drawing, wherein, fabric, 7', to the binder tape 7, as illustrated on Fig. 1 is a broken view illustrating my improved an exaggeated Scale in Fig- 90 cable; The proJections 5a may proJect from the inner Fig 2 is a section on une 2, 2 in Fig' 1; surface of the strips 5 to engage the shield 3, as illustrated in Figs. 6, 'I and 8. In this case the Fig. 3 is a section on line 3, 3 in Fig. 2; h Fig 4 is a detail perspective View; surface of the shield 3 may be milled, roughened,

40 Fig 5 is asection Online 5, 5 in Fig 4; 'serrated or striated, such as indicated at 3a, to 95 Fig. 6 is a broken view illustrating a modifcabe engaged by the prolecilons 5a, i0 keep the tion; strips 5 from displacement.

Fig '1 is 9, section 01111116 7, 7 in Fig 5, and In accordance with my invention the strips Fig, 3 is a detail perspective of part of Fig. or separators, which form the side walls of the Similar numerals indicate corresponding parts chmnels 6 (the channels bdmg defined by the 190 in the several views shield, the sheath and the strips), are kept from I have illustrated an electric cable made in a displacement and are maintained in DIODeI C011- convenient or well-known form comprising condition for the now 0f msulatlllg 011 through the ductor 1 (which may comprise Single or multiple channels, because the otherwise exible walls of so wires) having suitable insulation, et 2, and enthe Channel, formed by the strips 5. might become 1:3

closed within a, shield 31 Such as copper, and displaced and thereby reduce the width of the nnauy an outer sheath-1, such as lead, applied in Channels, which might occur during Winding or a well-known way. Between the shield and the unwnding and Straightening of the cable. With sheath, asillustrated, I Wind spaced strips or sepmy improvement the side walls of the channels arators 5, helically laid, preferably in a long lay, are retained substantially in the original spac- 110 nels between the strips along the insulated conductor, a binder around the strips, and a sheath around the binder, said strips having projections engaging the binder to prevent displacement of the strips. the binder being provided with a fabric mesh to engage the projections from the strips.

W'ILLIAMA. DEL MAR. 

